WO2020195844A1 - Visualization system for combustion chamber - Google Patents
Visualization system for combustion chamber Download PDFInfo
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- WO2020195844A1 WO2020195844A1 PCT/JP2020/010576 JP2020010576W WO2020195844A1 WO 2020195844 A1 WO2020195844 A1 WO 2020195844A1 JP 2020010576 W JP2020010576 W JP 2020010576W WO 2020195844 A1 WO2020195844 A1 WO 2020195844A1
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- WIPO (PCT)
- Prior art keywords
- visualization
- combustion chamber
- cylinder block
- arc
- wall surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
Definitions
- This disclosure relates to a combustion chamber visualization system.
- a visualization member (glass is exemplified as a material) is fitted in the communication hole from the side wall surface side of the cylinder block. Further, there is a type in which the visualization member is covered with a protective member (cover) from the outside of the cylinder block and pressed with a fixing member (for example, a bolt).
- the area of the protective member through which the fixing member can be inserted may be limited to both ends thereof in a plan view, which may result in improper fixing of the visualization member. ..
- An object of the present disclosure is to provide a combustion chamber visualization system capable of sufficiently fixing a visualization member with a protective member to a side wall surface of a cylinder block.
- the combustion chamber visualization system of the embodiment of the present disclosure for achieving the above object includes a combustion chamber of an internal combustion engine, the combustion chamber inside the combustion chamber, and communication between the wall surface of the combustion chamber and the side wall surface thereof.
- a protective member having a hole that allows the combustion chamber to be visually recognized through the visualization member and the communication hole in a side view while being abutted, and the visualization member are attached to the protective member.
- a combustion chamber visualization system including a plurality of fixing members that are abutted and fixed in a pressed state by the members, wherein the visualization member is in the width direction of a surface that comes into contact with the cylinder block.
- a first arc shape portion that is an arc shape that follows the shape of the wall surface of the combustion chamber in a plan view, and an arc shape that is different from the first arc shape in a plan view on the surface that abuts the protective member. It has a second arc-shaped portion, and the curvature of the second arc-shaped portion is made larger than the curvature of the first arc-shaped portion.
- the visualization member can be sufficiently fixed to the side wall surface of the cylinder block by the protective member.
- FIG. 1 is a side view illustrating the configuration of the combustion chamber visualization system of the present embodiment.
- FIG. 2 is a front view illustrating the configuration of the combustion chamber visualization system of FIG.
- FIG. 3 is a diagram illustrating the configuration of the combustion chamber visualization system of FIG. 1 in a cross-sectional view (front cross-sectional view) of lines III-III.
- FIG. 4 is a diagram illustrating the configuration of the combustion chamber visualization system of FIG. 1 in a plan view.
- FIG. 5 is a diagram illustrating the configuration of the combustion chamber visualization system of FIG. 1 in a VV line cross-sectional view (planar cross-sectional view).
- FIG. 1 is a side view illustrating the configuration of the combustion chamber visualization system of the present embodiment.
- FIG. 2 is a front view illustrating the configuration of the combustion chamber visualization system of FIG.
- FIG. 3 is a diagram illustrating the configuration of the combustion chamber visualization system of FIG. 1 in a cross-sectional view (front cross-sectional view) of lines III-
- FIG. 6 is a diagram illustrating a configuration in which the center of curvature of the second arc-shaped portion is located at the first arc-shaped portion in the combustion chamber visualization system of FIG. 1 in a line III-III cross-sectional view (front cross-sectional view). Is.
- the combustion chamber visualization system of the embodiment of the present disclosure will be described with reference to the drawings.
- the X direction is the width direction (horizontal direction) of the cylinder block 3 and the visualization member 4
- the Y direction is the depth direction (horizontal direction) of the cylinder block 3 and the visualization member 4
- the Z direction is the cylinder block. It is defined as the height direction (vertical direction) of 3 and the visualization member 4.
- the cylinder block 3 in each drawing of the present embodiment is shown not as a whole but as a part thereof.
- a photographing device is arranged to photograph the combustion state of the combustion chamber 2 via the hole 5a of the protective member 5 and the visualization member 4, and the illustration thereof is shown. It is omitted.
- the combustion chamber visualization system 1 of the present embodiment includes a combustion chamber 2, a cylinder block 3, a visualization member 4, a protective member (cover) 5, and a plurality of (this).
- a combustion chamber 2 As illustrated in FIGS. 1 to 5, the combustion chamber visualization system 1 of the present embodiment includes a combustion chamber 2, a cylinder block 3, a visualization member 4, a protective member (cover) 5, and a plurality of (this).
- it is a system including four fixing members (for example, bolts) 6.
- the combustion chamber 2 is arranged in the cylinder of the engine (internal combustion engine), and the fuel and fresh air are mixed and compressed inside and burned.
- the combustion chamber 2 has a substantially circular shape in a plan view.
- the cylinder block 3 is provided with a combustion chamber 2 inside, and a communication hole 7 for communicating the wall surface 2a of the combustion chamber 2 and the side wall surface 3a thereof is formed inside the cylinder block 3.
- the communication hole 7 is composed of a linear hole portion 7a extending horizontally in the depth direction of the cylinder block 3 and a fitting portion 7b to be fitted with a part of the visualization member 4.
- the hole portion 7a connects the wall surface 2a of the combustion chamber 2 and the central portion in the width direction of the tip portion of the fitting portion 7b in a plan view.
- the tip of the fitting portion 7b has the same shape as the tip of the visualization member 4 in a plan view.
- the first visualization member 4 has an arc shape that follows the shape of the wall surface 2a of the combustion chamber 2 at the center in the width direction of the surface that abuts on the cylinder block 3 (the surface of the tip of the fitting portion 7b) in a plan view.
- An arc-shaped portion 4a is formed.
- the arc-shaped portion 4a closes the end portion of the hole portion 7a in a state where the visualization member 4 is fitted to the fitting portion 7b.
- the arc-shaped portion 4a may be formed on at least a part of the surface of the tip end portion of the visualization member 4.
- the visualization member 4 is made of a transparent material (for example, glass or acrylic) so that the inside of the combustion chamber 2 can be visually recognized through the member 4 and the communication hole 7 in a side view.
- the protective member 5 is a metal member that is in contact with the visualization member 4 from the outside of the cylinder block 3 and protects the visualization member 4 from an impact or the like applied to the visualization member 4 from the outside of the cylinder block 3. is there.
- the protective member 5 is a plate-like body, the width of the protective member 5 is larger than the width of the visualization member 4, and the height of the protective member 5 is higher than the height of the visualization member 4.
- the protective member 5 is arranged at a position where the outer shape of the visualization member 4 is inside the outer shape of the protective member 5 in a side view.
- the protective member 5 has a hole portion 5a formed horizontally through the protective member 5 in the depth direction at the center position of the protective member 5 in a side view. It is possible to visually recognize the combustion chamber 2 from the hole 5a through the visualization member 4 and the communication hole 7 in a side view with the protective member 5 in contact with the visualization member 4.
- the plurality of fixing members 6 are outside the visualization member 4 from each of both end portions 5b of the protection member 5 to the side wall surface 3a of the cylinder block 3 in a plan view in a state where the visualization member 4 is in contact with the protection member 5. It is a member that fixes the visualization member 4 in a state of being abutted and pressed by the protective member 5 by being horizontally inserted in the depth direction of the visualization member 4.
- the protective member 5 is fixed to the side wall surface 3a of the cylinder block 3 by a plurality of fixing members 6, and the visualization member 4 is protected while being sandwiched between the protective member 5 and the side wall surface 3a of the cylinder block 3. It is fixed in a state of being abutted and pressed by the member 5.
- the entire surface (the surface of the rear end portion of the visualization member 4) that abuts the protection member 5 with respect to the visualization member 4 in a plan view is an arc different from the first arc shape.
- a second arc-shaped portion 4b which is a shape, is formed, and the curvature of the second arc-shaped portion 4b is made larger than the curvature of the first arc-shaped portion 4a.
- the radius of curvature R2 of the second arc-shaped portion 4b (the reciprocal of the curvature of the portion 4b) is made smaller than the radius of curvature R1 of the first arc-shaped portion 4a (the reciprocal of the curvature of the portion 4a).
- a recess is formed in the central portion of the tip portion of the protective member 5 in the width direction so as to fit the entire second arc-shaped portion 4b formed at the rear end portion of the visualization member 4.
- the radius of curvature R1 is the distance from the center C1 of the curvature of the first arc-shaped portion 4a to the peripheral edge of the first arc-shaped portion 4a in a plan view.
- the radius of curvature R2 is the distance from the center C2 of the curvature of the second arc-shaped portion 4b to the peripheral edge of the second arc-shaped portion 4b in a plan view.
- the straight line connecting both the curvature centers C1 and C2 in a plan view is parallel to the depth direction of the visualization member 4, the center in the width direction in the combustion chamber 2, the center in the width direction of the hole 7a, and the visualization member 4. It passes through the center in the width direction and the center in the width direction of the protective member 5.
- the rear end portion of the visualization member 4 is formed in the second arc-shaped portion 4b having a shape protruding toward the protection member 5 as in the present embodiment, the rear end portion of the visualization member 4 is made a flat surface.
- the distance between both ends 5b of the protective member 5, which is the starting point of the stress (pressing pressure) applied from the protective member 5 to the visualization member 4, and the rear end of the visualization member 4 becomes closer in a plan view. .. Therefore, the stress applied from the protective member 5 to the visualization member 4 is easily propagated from both end portions 5b of the protective member 5 to the first arc-shaped portion 4a via the second arc-shaped portion 4b.
- the curvature of the second arc-shaped portion 4b is made larger than the curvature of the first arc-shaped portion 4a. In this way, the stress propagated from the second arc-shaped portion 4b toward the center of the first arc-shaped portion 4a becomes large. Therefore, since the visualization member 4 is further pressed by the cylinder block 3, the visualization member 4 can be sufficiently fixed by the protective member 5 to the side wall surface 3a of the cylinder block 3.
- the visualization member 4 can be sufficiently fixed to the side wall surface 3a of the cylinder block 3 by the protective member 5.
- the present invention has the effect that the visualization member can be sufficiently fixed to the side wall surface of the cylinder block by the protective member, and is useful for a visualization system of a combustion chamber or the like.
- Combustion chamber visualization system 2 Combustion chamber 3 Cylinder block 4 Visualization member 4a 1st arc-shaped part 4b 2nd arc-shaped part 5 Protective member 6 Fixing member 7 Communication hole
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- Combustion & Propulsion (AREA)
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
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Abstract
In the present invention, a communicating hole 7 communicating through a wall surface 2a of a combustion chamber 2 and a side wall surface 3a of a cylinder block 3 is formed in the interior of the cylinder block 3. A visualizing member 4 is fitted into this communicating hole 7, from the side wall surface 3a side of the cylinder block 3. The visualizing member 4 is abutted and pressed with a protective member 5 from the outside of the cylinder block 3, and in that state a plurality of fixing members 6 are used to fix two ends 5b of the protective member 5 to the side wall surface 3a of the cylinder block 3. As pertains to the visualizing member 4 in plan view, a second arcuate portion 4b formed in a surface abutting against the protective member 5 has a greater curvature than the curvature of a first arcuate portion 4a formed in the center of the width direction of a surface abutting against the cylinder block 3.
Description
本開示は、燃焼室の可視化システムに関する。
This disclosure relates to a combustion chamber visualization system.
エンジン（内燃機関）の燃焼室内の燃焼状態を観察するために複数の窓部を有する可視化部をピストンに取り付けて、この可視化部を介して燃焼室内の燃焼状態を撮影部で撮影する撮影装置が提案されている（例えば、特許文献１参照）。
In order to observe the combustion state in the combustion chamber of an engine (internal combustion engine), a visualization unit having a plurality of windows is attached to a piston, and a photographing device that photographs the combustion state in the combustion chamber through this visualization unit is used. It has been proposed (see, for example, Patent Document 1).
ところで、シリンダブロックに、その外側から燃焼室内を観察可能な連通孔を設けた場合、この連通孔にシリンダブロックの側壁面側から可視化用部材（材質としてはガラスが例示される）を嵌装し、さらにシリンダブロックの外側から保護部材（カバー）で可視化用部材を覆い、固定用部材（例えばボルト）で押圧するものがある。
By the way, when the cylinder block is provided with a communication hole in which the combustion chamber can be observed from the outside, a visualization member (glass is exemplified as a material) is fitted in the communication hole from the side wall surface side of the cylinder block. Further, there is a type in which the visualization member is covered with a protective member (cover) from the outside of the cylinder block and pressed with a fixing member (for example, a bolt).
しかしながら、比較的小型のエンジンの場合には、平面視で固定用部材が挿通可能な保護部材の領域がその両端部に限定されることがあり、可視化用部材の固定の不備をもたらす虞がある。
However, in the case of a relatively small engine, the area of the protective member through which the fixing member can be inserted may be limited to both ends thereof in a plan view, which may result in improper fixing of the visualization member. ..
本開示の目的は、シリンダブロックの側壁面に対して保護部材により可視化用部材を十分に固定することができる燃焼室の可視化システムを提供することにある。
An object of the present disclosure is to provide a combustion chamber visualization system capable of sufficiently fixing a visualization member with a protective member to a side wall surface of a cylinder block.
上記の目的を達成するための本開示の態様の燃焼室の可視化システムは、内燃機関の燃焼室と、前記燃焼室をその内部に備えるとともに前記燃焼室の壁面とその側壁面とを連通する連通孔がその内部に形成されるシリンダブロックと、前記シリンダブロックの側壁面側から前記連通孔に対してその一部が嵌装される可視化用部材と、前記可視化用部材に前記シリンダブロックの外部から当接されるとともにこの当接された状態で側面視で前記可視化用部材及び前記連通孔を介して前記燃焼室を視認可能な孔部を有する保護部材と、前記可視化用部材が前記保護部材に当接された状態で平面視で前記保護部材の両端部より前記シリンダブロックの側壁面まで前記可視化用部材の外側から前記可視化用部材の奥行方向に挿通されることで前記可視化用部材を前記保護部材で当接及び押圧された状態で固定する複数の固定用部材と、を備えて構成される燃焼室の可視化システムであって、前記可視化用部材は、前記シリンダブロックと当接する面の幅方向中央部に、平面視で前記燃焼室の壁面の形状に沿う円弧形状である第１円弧形状の部分と、前記保護部材と当接する面に、平面視で前記第１円弧形状とは異なる円弧形状である第２円弧形状の部分と、を有し、前記第２円弧形状の部分の曲率を前記第１円弧形状の部分の曲率よりも大きくして構成される。
The combustion chamber visualization system of the embodiment of the present disclosure for achieving the above object includes a combustion chamber of an internal combustion engine, the combustion chamber inside the combustion chamber, and communication between the wall surface of the combustion chamber and the side wall surface thereof. A cylinder block in which a hole is formed inside the cylinder block, a visualization member in which a part of the hole is fitted to the communication hole from the side wall surface side of the cylinder block, and a visualization member from the outside of the cylinder block. A protective member having a hole that allows the combustion chamber to be visually recognized through the visualization member and the communication hole in a side view while being abutted, and the visualization member are attached to the protective member. The visualization member is protected by being inserted from the outside of the visualization member from both ends of the protection member to the side wall surface of the cylinder block in the abutted state in a plan view in the depth direction of the visualization member. A combustion chamber visualization system including a plurality of fixing members that are abutted and fixed in a pressed state by the members, wherein the visualization member is in the width direction of a surface that comes into contact with the cylinder block. In the central part, a first arc shape portion that is an arc shape that follows the shape of the wall surface of the combustion chamber in a plan view, and an arc shape that is different from the first arc shape in a plan view on the surface that abuts the protective member. It has a second arc-shaped portion, and the curvature of the second arc-shaped portion is made larger than the curvature of the first arc-shaped portion.
本開示によれば、シリンダブロックの側壁面に対して保護部材により可視化用部材を十分に固定することができる。
According to the present disclosure, the visualization member can be sufficiently fixed to the side wall surface of the cylinder block by the protective member.
以下、本開示の実施形態の燃焼室の可視化システムについて、図面を参照しながら説明する。本実施形態では、Ｘ方向をシリンダブロック３及び可視化用部材４の幅方向（水平方向）とし、Ｙ方向をシリンダブロック３及び可視化用部材４の奥行方向（水平方向）とし、Ｚ方向をシリンダブロック３及び可視化用部材４の高さ方向（鉛直方向）と定義する。また、本実施形態の各図面のシリンダブロック３に関してはその全体ではなくその一部を図示している。また、本実施形態の燃焼室の可視化システム１では、保護部材５の孔部５ａ及び可視化用部材４を介して燃焼室２の燃焼状態を撮影するために撮影装置が配置されるがその図示を省略している。
Hereinafter, the combustion chamber visualization system of the embodiment of the present disclosure will be described with reference to the drawings. In the present embodiment, the X direction is the width direction (horizontal direction) of the cylinder block 3 and the visualization member 4, the Y direction is the depth direction (horizontal direction) of the cylinder block 3 and the visualization member 4, and the Z direction is the cylinder block. It is defined as the height direction (vertical direction) of 3 and the visualization member 4. Further, the cylinder block 3 in each drawing of the present embodiment is shown not as a whole but as a part thereof. Further, in the combustion chamber visualization system 1 of the present embodiment, a photographing device is arranged to photograph the combustion state of the combustion chamber 2 via the hole 5a of the protective member 5 and the visualization member 4, and the illustration thereof is shown. It is omitted.
図１～図５に例示するように、本実施形態の燃焼室の可視化システム１は、燃焼室２と、シリンダブロック３と、可視化用部材４と、保護部材（カバー）５と、複数（本実施形態では４本）の固定用部材（例えばボルト）６と、を備えて構成されるシステムである。
As illustrated in FIGS. 1 to 5, the combustion chamber visualization system 1 of the present embodiment includes a combustion chamber 2, a cylinder block 3, a visualization member 4, a protective member (cover) 5, and a plurality of (this). In the embodiment, it is a system including four fixing members (for example, bolts) 6.
燃焼室２は、エンジン（内燃機関）の気筒内に配置されて、その内部で燃料と新気を混合圧縮させて燃焼させる。燃焼室２は平面視で略円形状である。シリンダブロック３は、燃焼室２をその内部に備えるとともに燃焼室２の壁面２ａとその側壁面３ａとを連通する連通孔７がその内部に形成される。
The combustion chamber 2 is arranged in the cylinder of the engine (internal combustion engine), and the fuel and fresh air are mixed and compressed inside and burned. The combustion chamber 2 has a substantially circular shape in a plan view. The cylinder block 3 is provided with a combustion chamber 2 inside, and a communication hole 7 for communicating the wall surface 2a of the combustion chamber 2 and the side wall surface 3a thereof is formed inside the cylinder block 3.
連通孔７は、シリンダブロック３の奥行方向に水平に延在する直線形状の孔部７ａと、可視化用部材４の一部と嵌装する嵌装部７ｂと、で構成される。孔部７ａは平面視で燃焼室２の壁面２ａと嵌装部７ｂの先端部の幅方向中央部を接続する。嵌装部７ｂは平面視でその先端部が可視化用部材４の先端部と同じ形状である。可視化用部材４の先端部が嵌装部７ｂの先端部に沿うように嵌装部７ｂに挿入されることで、可視化用部材４は嵌装部７ｂに嵌装される。
The communication hole 7 is composed of a linear hole portion 7a extending horizontally in the depth direction of the cylinder block 3 and a fitting portion 7b to be fitted with a part of the visualization member 4. The hole portion 7a connects the wall surface 2a of the combustion chamber 2 and the central portion in the width direction of the tip portion of the fitting portion 7b in a plan view. The tip of the fitting portion 7b has the same shape as the tip of the visualization member 4 in a plan view. By inserting the tip portion of the visualization member 4 into the fitting portion 7b along the tip portion of the fitting portion 7b, the visualization member 4 is fitted into the fitting portion 7b.
可視化用部材４は、シリンダブロック３の側壁面３ａ側から連通孔７の嵌装部７ｂに対してその一部が嵌装されている。可視化用部材４には、平面視でシリンダブロック３（嵌装部７ｂの先端部の面）と当接する面の幅方向中央部に燃焼室２の壁面２ａの形状に沿う円弧形状である第１円弧形状の部分４ａが形成されている。円弧形状の部分４ａは、可視化用部材４が嵌装部７ｂに嵌装された状態で孔部７ａの端部を塞ぐ。円弧形状の部分４ａは可視化用部材４の先端部の面の少なくとも一部に形成されていればよい。可視化用部材４は側面視でこの部材４及び連通孔７を介して燃焼室２の内部を視認可能なように透明な材質（例えばガラスやアクリル）で構成されている。
A part of the visualization member 4 is fitted to the fitting portion 7b of the communication hole 7 from the side wall surface 3a side of the cylinder block 3. The first visualization member 4 has an arc shape that follows the shape of the wall surface 2a of the combustion chamber 2 at the center in the width direction of the surface that abuts on the cylinder block 3 (the surface of the tip of the fitting portion 7b) in a plan view. An arc-shaped portion 4a is formed. The arc-shaped portion 4a closes the end portion of the hole portion 7a in a state where the visualization member 4 is fitted to the fitting portion 7b. The arc-shaped portion 4a may be formed on at least a part of the surface of the tip end portion of the visualization member 4. The visualization member 4 is made of a transparent material (for example, glass or acrylic) so that the inside of the combustion chamber 2 can be visually recognized through the member 4 and the communication hole 7 in a side view.
保護部材５は、可視化用部材４にシリンダブロック３の外部から当接されて、シリンダブロック３の外部から可視化用部材４に対して加わる衝撃等から可視化用部材４を保護する金属製の部材である。保護部材５は板状体で、保護部材５の幅は可視化用部材４の幅より大きく、保護部材５の高さは可視化用部材４の高さより高い。保護部材５は、図１に例示するように、側面視で可視化用部材４の外形が保護部材５の外形の内側となる位置に配置される。保護部材５は、側面視で保護部材５の中央位置に保護部材５の奥行方向に水平に貫通形成された孔部５ａを有する。保護部材５が可視化用部材４に当接された状態で側面視で孔部５ａから可視化用部材４及び連通孔７を介して燃焼室２を視認することが可能である。
The protective member 5 is a metal member that is in contact with the visualization member 4 from the outside of the cylinder block 3 and protects the visualization member 4 from an impact or the like applied to the visualization member 4 from the outside of the cylinder block 3. is there. The protective member 5 is a plate-like body, the width of the protective member 5 is larger than the width of the visualization member 4, and the height of the protective member 5 is higher than the height of the visualization member 4. As illustrated in FIG. 1, the protective member 5 is arranged at a position where the outer shape of the visualization member 4 is inside the outer shape of the protective member 5 in a side view. The protective member 5 has a hole portion 5a formed horizontally through the protective member 5 in the depth direction at the center position of the protective member 5 in a side view. It is possible to visually recognize the combustion chamber 2 from the hole 5a through the visualization member 4 and the communication hole 7 in a side view with the protective member 5 in contact with the visualization member 4.
複数の固定用部材６は、可視化用部材４が保護部材５に当接された状態で平面視で保護部材５の両端部５ｂの各々よりシリンダブロック３の側壁面３ａまで可視化用部材４の外側から可視化用部材４の奥行方向に水平に挿通されることで可視化用部材４を保護部材５で当接及び押圧された状態で固定する部材である。言い換えれば、保護部材５は複数の固定用部材６によりシリンダブロック３の側壁面３ａに固定されるとともに、可視化用部材４は保護部材５とシリンダブロック３の側壁面３ａに挟まれた状態で保護部材５より当接及び押圧された状態で固定される。
The plurality of fixing members 6 are outside the visualization member 4 from each of both end portions 5b of the protection member 5 to the side wall surface 3a of the cylinder block 3 in a plan view in a state where the visualization member 4 is in contact with the protection member 5. It is a member that fixes the visualization member 4 in a state of being abutted and pressed by the protective member 5 by being horizontally inserted in the depth direction of the visualization member 4. In other words, the protective member 5 is fixed to the side wall surface 3a of the cylinder block 3 by a plurality of fixing members 6, and the visualization member 4 is protected while being sandwiched between the protective member 5 and the side wall surface 3a of the cylinder block 3. It is fixed in a state of being abutted and pressed by the member 5.
本実施形態の燃焼室の可視化システム１では、平面視で可視化用部材４に関して保護部材５と当接する面（可視化用部材４の後端部の面）の全体に第１円弧形状とは異なる円弧形状である第２円弧形状の部分４ｂを形成して、この第２円弧形状の部分４ｂの曲率を第１円弧形状の部分４ａの曲率よりも大きくして構成する。言い換えれば、第２円弧形状の部分４ｂの曲率半径Ｒ２（部分４ｂの曲率の逆数）を第１円弧形状の部分４ａの曲率半径Ｒ１（部分４ａの曲率の逆数）より小さくする。平面視で保護部材５の先端部の幅方向中央部には、可視化用部材４の後端部に形成される第２円弧形状の部分４ｂの全体と嵌合する凹部が形成される。
In the combustion chamber visualization system 1 of the present embodiment, the entire surface (the surface of the rear end portion of the visualization member 4) that abuts the protection member 5 with respect to the visualization member 4 in a plan view is an arc different from the first arc shape. A second arc-shaped portion 4b, which is a shape, is formed, and the curvature of the second arc-shaped portion 4b is made larger than the curvature of the first arc-shaped portion 4a. In other words, the radius of curvature R2 of the second arc-shaped portion 4b (the reciprocal of the curvature of the portion 4b) is made smaller than the radius of curvature R1 of the first arc-shaped portion 4a (the reciprocal of the curvature of the portion 4a). In a plan view, a recess is formed in the central portion of the tip portion of the protective member 5 in the width direction so as to fit the entire second arc-shaped portion 4b formed at the rear end portion of the visualization member 4.
なお、曲率半径Ｒ１は、平面視で第１円弧形状の部分４ａの曲率の中心Ｃ１から第１の円弧形状の部分４ａの周縁までの距離である。曲率半径Ｒ２は、平面視で第２円弧形状の部分４ｂの曲率の中心Ｃ２から第２円弧形状の部分４ｂの周縁までの距離である。また、平面視で曲率中心Ｃ１、Ｃ２の両方を結ぶ直線は、可視化用部材４の奥行方向と平行で、燃焼室２内の幅方向中央、孔部７ａの幅方向中央、可視化用部材４の幅方向中央及び保護部材５の幅方向中央を通過する。
The radius of curvature R1 is the distance from the center C1 of the curvature of the first arc-shaped portion 4a to the peripheral edge of the first arc-shaped portion 4a in a plan view. The radius of curvature R2 is the distance from the center C2 of the curvature of the second arc-shaped portion 4b to the peripheral edge of the second arc-shaped portion 4b in a plan view. Further, the straight line connecting both the curvature centers C1 and C2 in a plan view is parallel to the depth direction of the visualization member 4, the center in the width direction in the combustion chamber 2, the center in the width direction of the hole 7a, and the visualization member 4. It passes through the center in the width direction and the center in the width direction of the protective member 5.
本実施形態のように可視化用部材４の後端部を保護部材５側に凸した形状である第２円弧形状の部分４ｂに形成すると、可視化用部材４の後端部を平坦面とする場合と比較して、保護部材５から可視化用部材４に加わる応力（押圧力）の起点となる保護部材５の両端部５ｂと可視化用部材４の後端部の間の距離が平面視で近くなる。そのため、保護部材５から可視化用部材４に加わる応力は、保護部材５の両端部５ｂから第２円弧形状の部分４ｂを介して第１円弧形状の部分４ａに伝播され易くなる。
When the rear end portion of the visualization member 4 is formed in the second arc-shaped portion 4b having a shape protruding toward the protection member 5 as in the present embodiment, the rear end portion of the visualization member 4 is made a flat surface. The distance between both ends 5b of the protective member 5, which is the starting point of the stress (pressing pressure) applied from the protective member 5 to the visualization member 4, and the rear end of the visualization member 4 becomes closer in a plan view. .. Therefore, the stress applied from the protective member 5 to the visualization member 4 is easily propagated from both end portions 5b of the protective member 5 to the first arc-shaped portion 4a via the second arc-shaped portion 4b.
さらに、第２円弧形状の部分４ｂの曲率を第１円弧形状の部分４ａの曲率よりも大きくする。このようにすると、第２円弧形状の部分４ｂから第１円弧形状の部分４ａの中心方向に伝播される応力が大きくなる。そのため、可視化用部材４がシリンダブロック３により一層押し付けられた状態となるので、シリンダブロック３の側壁面３ａに対して保護部材５により可視化用部材４を十分に固定することができる。
Further, the curvature of the second arc-shaped portion 4b is made larger than the curvature of the first arc-shaped portion 4a. In this way, the stress propagated from the second arc-shaped portion 4b toward the center of the first arc-shaped portion 4a becomes large. Therefore, since the visualization member 4 is further pressed by the cylinder block 3, the visualization member 4 can be sufficiently fixed by the protective member 5 to the side wall surface 3a of the cylinder block 3.
特に、図６に例示するように、第２円弧形状の部分４ｂの曲率の中心Ｃ２を第１円弧形状の部分４ａに位置して構成すると、第２円弧形状の部分４ｂに伝播された応力の向きは第１円弧形状の部分４ａに位置する曲率の中心Ｃ２に向かう方向となるので、第２円弧形状の部分４ｂから第１円弧形状の部分４ａに伝播される応力をより一層大きくすることができる。
In particular, as illustrated in FIG. 6, when the center C2 of the curvature of the second arc-shaped portion 4b is located at the first arc-shaped portion 4a, the stress propagated to the second arc-shaped portion 4b is generated. Since the direction is toward the center C2 of the curvature located at the first arc-shaped portion 4a, the stress propagated from the second arc-shaped portion 4b to the first arc-shaped portion 4a can be further increased. it can.
以上より、本実施形態の燃焼室の可視化システム１によれば、シリンダブロック３の側壁面３ａに対して保護部材５により可視化用部材４を十分に固定することができる。
From the above, according to the combustion chamber visualization system 1 of the present embodiment, the visualization member 4 can be sufficiently fixed to the side wall surface 3a of the cylinder block 3 by the protective member 5.
本出願は、2019年3月27日付で出願された日本国特許出願（特願2019-059891）に基づくものであり、その内容はここに参照として取り込まれる。
This application is based on a Japanese patent application (Japanese Patent Application No. 2019-059891) filed on March 27, 2019, the contents of which are incorporated herein by reference.
本発明は、シリンダブロックの側壁面に対して保護部材により可視化用部材を十分に固定することができるという効果を有し、燃焼室の可視化システム等に有用である。
The present invention has the effect that the visualization member can be sufficiently fixed to the side wall surface of the cylinder block by the protective member, and is useful for a visualization system of a combustion chamber or the like.
１ 燃焼室の可視化システム
２ 燃焼室
３ シリンダブロック
４ 可視化用部材
４ａ 第１円弧形状の部分
４ｂ 第２円弧形状の部分
５ 保護部材
６ 固定用部材
７ 連通孔 1 Combustionchamber visualization system 2 Combustion chamber 3 Cylinder block 4 Visualization member 4a 1st arc-shaped part 4b 2nd arc-shaped part 5 Protective member 6 Fixing member 7 Communication hole
２ 燃焼室
３ シリンダブロック
４ 可視化用部材
４ａ 第１円弧形状の部分
４ｂ 第２円弧形状の部分
５ 保護部材
６ 固定用部材
７ 連通孔 1 Combustion
Claims (2)
- 内燃機関の燃焼室と、
前記燃焼室をその内部に備えるとともに前記燃焼室の壁面とその側壁面とを連通する連通孔がその内部に形成されるシリンダブロックと、
前記シリンダブロックの側壁面側から前記連通孔に対してその一部が嵌装される可視化用部材と、
前記可視化用部材に前記シリンダブロックの外部から当接されるとともにこの当接された状態で側面視で前記可視化用部材及び前記連通孔を介して前記燃焼室を視認可能な孔部を有する保護部材と、
前記可視化用部材が前記保護部材に当接された状態で平面視で前記保護部材の両端部より前記シリンダブロックの側壁面まで前記可視化用部材の外側から前記可視化用部材の奥行方向に挿通されることで前記可視化用部材を前記保護部材で当接及び押圧された状態で固定する複数の固定用部材と、
を備えて構成される燃焼室の可視化システムであって、
前記可視化用部材は、
前記シリンダブロックと当接する面の幅方向中央部に、平面視で前記燃焼室の壁面の形状に沿う円弧形状である第１円弧形状の部分と、
前記保護部材と当接する面に、平面視で前記第１円弧形状とは異なる円弧形状である第２円弧形状の部分と、を有し、
前記第２円弧形状の部分の曲率を前記第１円弧形状の部分の曲率よりも大きくして構成される、
燃焼室の可視化システム。 The combustion chamber of the internal combustion engine and
A cylinder block having the combustion chamber inside and having a communication hole for communicating the wall surface of the combustion chamber and the side wall surface thereof.
A visualization member in which a part of the communication hole is fitted from the side wall surface side of the cylinder block.
A protective member having a hole that allows the combustion chamber to be visually recognized through the visualization member and the communication hole in a side view while being in contact with the visualization member from the outside of the cylinder block. When,
The visualization member is inserted from the outside of the visualization member in the depth direction of the visualization member from both ends of the protection member to the side wall surface of the cylinder block in a plan view in a state where the visualization member is in contact with the protection member. As a result, a plurality of fixing members that fix the visualization member in a state of being abutted and pressed by the protective member, and
It is a combustion chamber visualization system that is configured with
The visualization member is
At the center of the surface in contact with the cylinder block in the width direction, a first arc-shaped portion having an arc shape that follows the shape of the wall surface of the combustion chamber in a plan view,
The surface that comes into contact with the protective member has a portion having a second arc shape that is different from the first arc shape in a plan view.
The curvature of the second arc-shaped portion is made larger than the curvature of the first arc-shaped portion.
Combustion chamber visualization system. - 前記第２円弧形状の部分の曲率の中心を前記第１円弧形状の部分に位置して構成される請求項１に記載の燃焼室の可視化システム。 The visualization system for a combustion chamber according to claim 1, wherein the center of curvature of the second arc-shaped portion is located at the first arc-shaped portion.
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|---|---|---|---|
| JP2019-059891 | 2019-03-27 | ||
| JP2019059891A JP2020159878A (en) | 2019-03-27 | 2019-03-27 | Combustion chamber visualization system |
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| WO2020195844A1 true WO2020195844A1 (en) | 2020-10-01 |
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| PCT/JP2020/010576 WO2020195844A1 (en) | 2019-03-27 | 2020-03-11 | Visualization system for combustion chamber |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0144357Y2 (en) * | 1982-06-02 | 1989-12-21 | ||
| JP2009115169A (en) * | 2007-11-05 | 2009-05-28 | Toyota Motor Corp | Seal member |
| JP2012072725A (en) * | 2010-09-29 | 2012-04-12 | Kyocera Corp | Structure for internal combustion engine, internal combustion engine with position detection mechanism and internal combustion engine with liquid state detection mechanism |
| CN104749025A (en) * | 2015-04-16 | 2015-07-01 | 煤炭科学技术研究院有限公司 | Macro-micro three-axis visual pressure chamber for coal and rock |
| CN107023378A (en) * | 2017-06-01 | 2017-08-08 | 天津大学 | Burning chamber of diesel engine with visualization form |
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2019
- 2019-03-27 JP JP2019059891A patent/JP2020159878A/en active Pending
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2020
- 2020-03-11 WO PCT/JP2020/010576 patent/WO2020195844A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0144357Y2 (en) * | 1982-06-02 | 1989-12-21 | ||
| JP2009115169A (en) * | 2007-11-05 | 2009-05-28 | Toyota Motor Corp | Seal member |
| JP2012072725A (en) * | 2010-09-29 | 2012-04-12 | Kyocera Corp | Structure for internal combustion engine, internal combustion engine with position detection mechanism and internal combustion engine with liquid state detection mechanism |
| CN104749025A (en) * | 2015-04-16 | 2015-07-01 | 煤炭科学技术研究院有限公司 | Macro-micro three-axis visual pressure chamber for coal and rock |
| CN107023378A (en) * | 2017-06-01 | 2017-08-08 | 天津大学 | Burning chamber of diesel engine with visualization form |
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